Key Science 5. Evaluation. Unit 5

Unit 5 Matter Name:

1. What

Date:

are the two general properties of matter and how are they measured?

2. Match

the three columns.

Water

•

•

Solids

•

• Keep its shape and volume.

Carbon dioxide

•

•

Liquids

•

• Keep its volume but not its shape.

Glass

•

•

Gases

•

• Do not keep its shape or volume.

3. Look

at the arrows. Write the name of the changes they represent.

Solid

4. Complete

Liquid

the text.

•

cannot be separated into other substances.

substance. water and 5. Write

Gas

is a pure

are made of two or more substances substances.. Seawater is a mixture of .

if the sentences are true or false. Then correct the false sentences.

a) Combustion is when the oxygen in the air and water come into contact with iron. b) When there is a chemical change, matter changes its composition. c) Combustion is a very slow process of oxidation.

KEY SCIENCE 5 PHOTOCOPIABLE MATERIAL

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Unit 5 Matter Name:

6. Name

Date:

three types of chemical changes.

7. After

burning paper or wood, the remaining ash weighs less than the original matter. Has some of its mass disappeared? Explain what has happened.

8. Circle

the correct answer.

a) Iron undergoes this process when it comes into contact with oxygen. Melting / Oxidation b) The chemical change gasoline undergoes when it rapidly comes into contact with oxygen Combustion / Evaporation c) Living things help create this chemical process in the absence of oxygen. Oxidation / Fermentation

9. Look

at the pictures. Write which one is a pure substance, a homogenous mixture and a  heterogeneous mixture. a

b

c

10. Give

an example of a food product that we make by using fermentation. Then explain this chemical process.

KEY SCIENCE 5 PHOTOCOPIABLE MATERIAL

17 evaluation worksheets